Gas-fired furnace having tile burners



Patented Dec. 27, 1927. v

UNITED STATES HENRY o.

LOEBELL, or MALLBA, NEWYORK, 'AssIGNon To COMBUSTION nTILITIEs 1,653,864 PATENT OFFICE...

CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF MAINE.

. GAS-FIRED FURNACE HAVING TILE BUBHERS.

Application filed January 5, 1927. Serial No. 159,034.

This invention relates to improvements in means for burning combustible gaseous mix tures. I g The principal object of the invention is to provide a burner which of itself shall constitute a source of radiant heat. Another object of the invention is to provide a burner of such construction that it may serve as a combined heating element. and wall of a furnace.

. Another object of the invention is so to construct a burner of the character indicated that it can be built up from a plurality of similar tile members. l5

aswill hereinafter more fully appear in the detailed description of the invention.

Referring to the drawing wherein the preferred form of the invention is shown:

Fig. l is a vertical sectional view through a regenerative furnace showing the roof as embodying the burner of the present invention;

taken of line 2-2 of Fig. 1;

Fig. 3 is an end elevation 'of one form of tile members from which the burnermay be constructed; v I a Fig. 4 is a side elevation of the tiles shown -in Fig. 3;

Fig. 5 is a plan view of a modified form of burner surface;

Fig. 6 is a sectiontaken on line 66 of Fig. '5 and showing the preferred form of tiles from which a burner of the type shown in Fig. 5 may be built up; and

. Fig. 7 is an elevation with parts in section of tile members shown in Figs. 5 and 6. I

The invention has been shown as embodied in a forge furnace of the regenerative type wherein the hearth is indicated at 105 the roof at 12 and the regenerators at 14, thev The invention also embodies other objects Fig. 2 is a sectional view of the furnace and thus constitute them sources of radiant. heat. The combustible mixture is introduced into the bottom of the pits through passages formed in the burner wall. The burner. surface is preferably built up from a plurality of like ends of similar tiles which are pref-g 'erably rectangular in cross-sectionabove said ends in order that a burner surface or wall of the desired area may be easily and cheap-' ly built up. I I I I I For illustrative purposes the form of burner surface shown in Figs. 3 ands .has been shownas constituting-the roof of the furnace. I I Like reference characters refer to similar parts throughout the several views.

In Figs. 3 and f the tiles are shown as provided with wedge-shapedends whereby I when they are arranged alongside each other a trough or pit 20 is formed. The sides of 5 the tile for a short distance above the. sides of the wedge are indented to providea nar-. row feed passage 22 and main supply passage 24 for the combustible mixture which is to be burned in the pits. The feed passage 22in this form of the invention is coextensive with the length of the trough or pit but itis within the spirit of the invention tO- make the feed passage non-continuous, that is to say, as a series of holes leadingfrom the supply passage 2% to, the bottom of thetrough or pit. The form of tiles shown'in Figs. 3 and 4: can; be manufactured at relatively small expense and ordinarily will constitute the preferred form of tiles to be used in building up the burner surface. I 1 Figs. 5, 6 and 7 collectively show a tile construction which embodies the essential characteristics of the already described form of tile, thatis to say,1it embodies a pitted sur-v face and passages in the tiles by means of which the combustible mixture is supplied to the bottom of the'pits for burning. in this particular construction, however v each tile is fprmed to provide a four sided pit. in an end thereof whereby the burner surface comprises a series of non-continuous pits as distinguished from alined pits communicating with each other at their ends as in the construction shown in Figs. 3 and 4. However, the main supply passage 24 in the individual tiles communicate with each other as in the other construction. The combustible mixture is entered into the pits through individual passages or ports 22 leading from providedwith a controll ing valve hen the burner is tobeused in a regenerative the supply passage 24ers will be nowireadily understood.

In accordance with the present invention the combustible mixture is an explosive gaseous mixture. A mixture of such composition will burninthe absence of air in the pits and provide maximum heatin the pits withthe result that the pit walls will become glowing hot and serve as sources oft radiant heat which Will be radiated onto'the work to be heated" by reason of theflai'ing side walls.

Thedepthofthepits is an importantfactor to satisfactory operation, the best-re sultsbe-inlg obtained when the angle included between the pit walls is inthe neighborhood of 90; Thetiles are preferably made from a refi-aetory material whicluis a poor conductor ottheattherebyniaking it practicable to build a furnace wall and burner asa unit.

As already indicated biirnersconstructed in accoidancewith the present invention are particularly well adapted for use a com bined heating element and furnace wall or i roof in various type of furnaces. In the present application the burner has been shown as constituting the roof of a regenerativeforge furnace. The burner tiles are suspendedorer the hearth-l0 iii-any suitable manner or as shown. If the pits are in the form of a continuous trough, the gaseous mixture conveniently introduced at one end of the 'alined tile conduits 24: as by means of atube or ipej 26 extending through a side ivallflof t 1e furnace, each pipe being furnace the burned. is preferably divided into two banks'of equal area by a clividing wall 32 and the banks alternately fired. Assum ing that the right hand bank is to be tired, hot ail-from the right hand regenerator 14 is led upwardly through a passagege and discharged into the streainot gas flowing toward the tile conduit 24:, a damper36 being provided in the passage 34 "to regulate the air supply. A gate 38 in the furnace wall adjacent the burner at the left hand side of *the'furnace controls the flow of the products of combustion tothe left hand re generator 14. When the left hand burner bani: is fired the left hand gate isclosed and the right hand gate 38=opened aswi1l now be readily understood. 'lhework door passa go into the heating chamber isindicated at 40,

The burner can also be used in connection with a recuperator furnace by firing only every other trough the interniedlate troughs serving as an outletfor the combustion products being understood thattlie outlet end of such trough will be connected with a passage leading; directly to the recuperator.

What is claimed is:

L. A coinbined wall and burner having a surface comprised of a pluralitg, of like ends of similtir tiles, said ends being: formed to constitute a series of out\vardlyfla ring,*rela tively shallow pits, and passages in the it opening oh the bottom of the pits, said p sages constituting conduits through Whichh :1 combustible gaseous mixture may be intro duccd into saidpits. i l

2. A coniljiined wall and burner having a surface coinprised of a plurality oi like i his of similar til-es. said end being forinpl to constitute a series of outwaidly-flaring, i'el atively shallow pits, andal ined passe-fies in the tiles opening on the bottom oifthe pits,

said passages constituting conduits through 1 which a conibus tible gaseous n'iixi'ure may lie introduced intosaid pits.

3. In a heati of a combined roof and burner having: an inner surface provided with a phu'ality of outwardlyfluring relatively shallow pits,

and passages in the roof in open communi cation with the bottom o t the pits through which a combustible gaseous mixture ma "he introduced into the pits.

4:. In a heating u'rnace, thecomhinat ion of a combinedf'bhrner and roof llflllngtlll inner surface provided with a plurality of outwardlyflaring, relatively shallow pits,

means dividing the pits into two independent banks, independent passages for ('tlClll bank 111 open communication with the bottom of the tpits through which a combustible In testimony whereoi. I afli)"; my siunature.

HENRY 0. LOEBELL;

i chamber, the eombination 

